GC5016 Datasheet, PDF (74/88 Pages) Texas Instruments – WIDEBAND QUAD DIGITAL DOWN CONVERTER/ UP CONVERTER

GC5016
SLWS142G − JANUARY 2003 − REVISED NOVEMBER 2005
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Table 36. AGC Maximum Adaptation Limit Page 0x13 Address 0x16
Rcv Tx
FIELD
D
D agc_max
BITS
15..0
Dflt
DESCRIPTION
0
AGC maximum adaptation limit. Upper limit for adapted gain is manual_gain + agc_max
Table 37. AGC Counts and Threshold Page 0x13 Address 0x17
Rcv Tx
FIELD
BITS
D
D agc_zero_cnt 3..0
D
D agc_sat_cnt 7..4
D
D agc_thresh 15..8
Dflt
DESCRIPTION
0
Run of zeros before fast adaptation gain increase step Dzro is used
0
Run of saturated values before fast adaptation gain reduction step Dsat is used
0
Threshold for AGC adaptation
Rcv Tx
D
D
D
D
D
D
D
D
FIELD
agc_Dblw
agc_Dabv
agc_Dzro
agc_Dsat
Table 38. AGC Loop Gains Page 0x13 Address 0x18
BITS Dflt
3..0
0
Gain shift for below threshold
7..4
0
Gain shift for above threshold
11..8 0
Gain shift for zero data
15..12 0
Gain shift for saturated
DESCRIPTION
Rcv Tx
−
−
Table 39. AGC Gain Read Back Page 0x13 Address 0x19
FIELD
gain_read
BITS
15..0
Dflt
DESCRIPTION
Read back of top 16 of 19 bits, current gain setting (read only)
17.12 Power Meter
The Power Meter integrates the I squared and Q squared values, over the integration counts. Table 43 is the
integration counts. Table 42 is the controller setup, Tables 40 and 41 are the 32bit accumulated value.
Table 40. Power Meter (LSB) Page 0x13 Address 0x1A
Rcv Tx
FIELD
−
− pwr_meter_lsb
BITS
15..0
Dflt
DESCRIPTION
Read back of power meter least significant 16 bits (read only)
Table 41. Power Meter (MSB) Page 0x13 Address 0x1B
Rcv Tx
FIELD
−
− pwr_meter_msb
BITS
15..0
Dflt
DESCRIPTION
Read back of power meter most significant 16 bits (read only)
Rcv Tx
−
−
−
−
−
−
FIELD
ready
missed
too_soon
−
− pwr_os
D
D pwr_msr
−
− gain_sign
74
Table 42. Power Meter Status Page 0x13 Address 0x1C
BITS
15
14
13
12
11
10
9..8
7
6
5
4..0
Dflt
DESCRIPTION
1 means power sample ready to read, user must reset to 0
Set if power sample missed; reset by user
Set if power sample reads too soon; reset by user
Factory test bit keep 0
Power Meter One shot control keep 0 if pwr_msr = 1, if pwr_msr = 0, then use to fire one
shot. 0 = armed, 1 = triggered; be sure that there are 2 clocks between arming and
triggering
0
1 = use read of register (address 0x1B) to fire one shot; 0 = manually fire one shot
Unused
Read only, sign bit from gain. Only useful if one collects statistics over time.
Sticky bit, set if gain zero = 1, reset by user (See Table 2)
Sticky bit, set if gain saturated = 1, reset by user (See Table 2)
Unused